/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. */

#include "paddle/fluid/operators/jit/more/mkl/mkl.h"
#include "paddle/fluid/operators/jit/refer/refer.h"
#include "paddle/fluid/operators/jit/registry.h"
#include "paddle/fluid/platform/cpu_info.h"
#include "paddle/fluid/platform/dynload/mklml.h"

namespace paddle {
namespace operators {
namespace jit {
namespace more {
namespace mkl {

template <>
void VMul<float>(const float* x, const float* y, float* z, int n) {
  platform::dynload::vsMul(n, x, y, z);
}

template <>
void VMul<double>(const double* x, const double* y, double* z, int n) {
  platform::dynload::vdMul(n, x, y, z);
}

template <>
void VAdd<float>(const float* x, const float* y, float* z, int n) {
  platform::dynload::vsAdd(n, x, y, z);
}

template <>
void VAdd<double>(const double* x, const double* y, double* z, int n) {
  platform::dynload::vdAdd(n, x, y, z);
}

template <>
void VScal<float>(const float* a, const float* x, float* y, int n) {
  if (x == y) {
    platform::dynload::cblas_sscal(n, *a, y, 1);
  } else {
    refer::VScal<float>(a, x, y, n);
  }
}

template <>
void VScal<double>(const double* a, const double* x, double* y, int n) {
  if (x == y) {
    platform::dynload::cblas_dscal(n, *a, y, 1);
  } else {
    refer::VScal<double>(a, x, y, n);
  }
}

// TODO(TJ): tuning me carefully on AVX, AVX2 and AVX512
template <>
bool VMulKernel<float>::UseMe(int d) const {
  return platform::MayIUse(platform::avx512f) && d > 512;
}

template <>
bool VAddKernel<float>::UseMe(int d) const {
  return platform::MayIUse(platform::avx512f) && d > 512;
}

template <>
bool VScalKernel<float>::UseMe(int d) const {
  return platform::MayIUse(platform::avx512f) && d > 512;
}

#define AWALYS_USE_ME_WITH_DOUBLE(func)           \
  template <>                                     \
  bool func##Kernel<double>::UseMe(int d) const { \
    return true;                                  \
  }

AWALYS_USE_ME_WITH_DOUBLE(VMul);
AWALYS_USE_ME_WITH_DOUBLE(VAdd);
AWALYS_USE_ME_WITH_DOUBLE(VScal);

#undef AWALYS_USE_ME_WITH_DOUBLE
}  // namespace mkl
}  // namespace more
}  // namespace jit
}  // namespace operators
}  // namespace paddle

namespace mkl = paddle::operators::jit::more::mkl;

#define REGISTER_MKL_KERNEL(key, func)                        \
  REGISTER_JITKERNEL_MORE(key, mkl, mkl::func##Kernel<float>, \
                          mkl::func##Kernel<double>)

REGISTER_MKL_KERNEL(vmul, VMul);
REGISTER_MKL_KERNEL(vadd, VAdd);
REGISTER_MKL_KERNEL(vscal, VScal);

#undef REGISTER_MKL_KERNEL